Means for extruding hollow bodies.



, l A. P. HINB. MEANS FOR BXTRUDING HOLLOW BODIES. APPLICATION FILED JAILSJ, 1909. RENEWED OCT. i. 1909.

Patented Nov. 30, 1909.

3 SEEETS-SHEET 1.'

A. P. HINE. MEANS PoR BXTRUDING HOLLOW BODIES. APPLICATION FILED JARA?, 1909.l BENBWBD 00T. 4, 1909.

Patented Nov. 30, 1909.

3 SHEETS-SHEET 2.

N. Th om m W/ ...1

@vih-mimo: l I

A. P. EINE. MEANS FOB. EXTBUDING HOLLOW BODIES.

APPLIOATIOH rILnD ums, 1909. xnNBwnD C214, wos.

941,365. Patented N0v.3o,19o9.

3 SHEETS-SHEET 3.

y 'UNITED STATES ,PATENT oiricn.

ADELBERT P. HINE. OF XVATERBURY. CONNECTICUT. ASSIGNOR T0 COE BRASS MANU- FACTURING COMPANY` OF WATERBURY. CONNECTICUT, A CORPORATION OF CON- NECTICUT.

Specication o( Iietteri. Patent.

Application filed January 9, 1909, Serial No. 471.@15.' Renewed October 4, 1909. Serial No. 520,971.

My intention relates to improieuicnts in.

apparatus for cxtr'uding metal to forni hollow bodies.

The object of the invention is to provide a simple and ellicient means for forming. by an extrudiiig prot-(15s, hollow bodies of any desired crow-section both internally and externally, which apparatus guarantees by its construction a uniformity of production.`

1n the drawings: Figure I conventionally g. illustrates, on a small scale, one preferred I form of my invention, said figure being mainly iii section and showing onl)r .stu-h parts as it ia necersaii t0 refer to'for the A nrpose of making elcar my improvement.t

"ig, :2 is a side elevation of the parts shown in Fig. 1. Fig. It is a section on the line .r-a' of Fig. :l looking in the direction of the arrow and `showing certain partal in elevation. Fig. -lis a xiew on a relatively re duced reale of :i-iumlitieatioii. etitl elt\':itlo.^i ol' Fig. ti iii llte plain* tif ill@ lingI l,'--// looking in the direction of the,

arrow and l ho\\^iug certain partal iii ele\ ation.A Fig. is a section on the line 2-2 looking in the direction of the arrow and showing parlaA in elevation. First referring to Figa. l lo 25. the cot.'- struetion therein shown eonipribes a o called "eoiitainei"` l. haring a evlindrii-al passage therethrough in which a billet of y the metal to be extruded is lot-ated. il is a die of unable ero .-eetton and arranged to furnish the de-tired external contour to the f locali-lextruded iin-tal. t is a mandrel within the bore of the container l. the forward eiid of which stands adjaeeiit to. or iii Fig. 5 is an 1 titl able on the mandrel l and fitting the bore 1 of the container 1 and slid'able therein.

'i' .is a plunger operated in any suitable manner, for example, by the usual hydraulic means'. This plunger T is split or divided at its forward end as best seen in Fig. L', so as to stratldle the bracket 5 whcreb)Y the forward extreniitie; of said pltinger may be caused to engage the dummy t3 and push it ahead.

From the foregoing the operation will be eeu to be as follows: A dic of suitable outline is secured iii place at the outlet of the container 1, Such dies being interchangeable lo'l'urnish different designs, as desired. A perforated billet :Z of hot metal to be extruded is. then placed in the container. 'lhe dummy or follower 6 is then placed in thc lior'e of the container to the rear of the billet lhc mandrel -l and bracket :'i are ther.

applied; the mandrel being inserted through a central passage in the duinmj,v t5. '1 he bracket 5 is then suitably secured against lmoreinent. as by screw studs or bolts 8 8 tfzuued t'orward movement of the plunger T- "d'plaees the metal of the billet which Ilows out through the pace around the mandrel -t f and' die :l in such niainu-r as to produce a therewith in the forming ot' the extruded l product. 'l`he .-.hape ol' the mandrel end. iu

fictilty is t'ouud in holding the mando-h properly o that its forward end (which determinec the interior conformation of th.-

sueh relation to. the ditl il. as. to cooperate I hollow boil)` ot' the desired e \terual and iiicrois-section. coi'i'e.`|ioiid 4 to the de-ired iuniodilieation in which. instead ot' aplitting fthe forward etui ot' the plunger `o :rs to titi-w it to V iiaddle the bracket .3 to which the tear end of tho mandrel is connected. l

mount .said bracket in auch a manner :ia to 'avoid splitting aid plunger. vlu the@ liguren (l to 6) l represents the Container; 2.).

imA

tot)

v4erratas the billet; .3 the die; 4a the mandrel; 5a the bracket for the rear end of the mandrel; G the ,follower or dummy; 7 the forward part ofthe plunger, 7b the intermediate part of rthe plunger, and 7 is the piston end of the plunger located within the hydraulic cylinder 9. l0-10 areguides for the plunger in all of the views. As will be seen in Figs. 4 to 6, instead of splitting the forward end of the plunger 7a, the split occurs at 7d Fig.- 4) in the intermediate part 7" of the plunger, said bracket 5a standing in said split or, longitudinal passage so that as the plunger advances, it will not inlluence the position of the mandrel. In this modification, .screw bolts or studs 8 hold the bracket 5 to. one of the guides.

It should be understood that the various parts are made adjustable and dismountable,

ut the particular'means for adjusting or dismounting said parts need not be described since they constitute no essential part of this invention broadly speaking.

In the pretzerred construction, in all instances, the main body of the mandrel is made heavier in cross-section than the crosssection of that part of themandrel which forms the internal wall oithe extruded product. By this means great strength and resistance to lateral deflection is a'orded. The main body of the mandrel may be round, or of some uniform shape, throughout the greater portion of its length, whereby a snug fit will occur between it. and the dummy 6, at all positions of the latter thereon, thus preventing back leakage of the netal past sald dummy.

Bypreterence, the body of the mandrel is of circular cross-sectional outline save at its forward forming end where any desired shape may be provided according to the intended internal cross-sectional outline of the extruded metal.

The forward end of the mandrel in each instance may be formed by a removable .piece 4b whereby ends of diere'nt designs may be interchangeably employed. The removable ends in all instances are furnished with' any suitable attaching means.

It will be observed that the follower serves to'support lthe mandrel against lateral deflection and thus supplements the action of the'v bracket in this respect.

lVhat I claim is: v `1 In a machine for producing hollow tubularhodies, a container havinga bore therein, a'die carried by said container in line with said bore, a mandrel, means for holding said mandrel in said container. a dummy or follower slidahly litting said mandrel and karranged in line with said bore, a mandrel,

a bracket for holding the sume within said bore and arranged to coiperate with saidl die. a dummy slidably fitting said mandrel and the wall of said bore. and .a power driven plunger movable ,indeiwndently ol .said mandrel and bracket, and arranged to engage and force said dummy forwardly. t. In a machine of the character described, a container having a bore therein. a die in line with .said bore at the outlet end thereof, a power driven plunger, a mandrel independent thereof vand arranged to 'cooperate with said die, a bracket or holding said mandrel against. longitudinal movement and in cooperative relation with said die, and dummy or follower having a sliding tit o'r said -mandrel and within said bore, said plunger cooperating with said follower for the purpose described.

4. In a machine of the character described, a container having a bore of uniform crosssectional size, a die at the outletend of said bore haring a passage of suitable outline. a mandrel having a forward removable end of a suitable cross-sectional outline adapted to cooperate with said die, means for holding said mandrel in coperative relation with said die, a power driven lunger independent of said mandrel, a fo lower having a slidingr lit upon said mandrel and a sliding fit with the wall of said bore, and arranged to be moved forwardly by said plunger.

5. In a machine for extruding hollow bodies, a (Jntainer having a bore thereinlra die carried by said container in line with said bore, a mandrel arranged to coperate with the die, and means for holding said mandrel in coperative relation thereto, a dummy or follower slidable within'the. container and upon the mandrel and operating as a closure for.` the space around said mandrel within the die, and means to force .said dummy or follower toward the die, independent ot the mandrel.

ADELBERT I. HIN E.

lVitnesses EDWARD T. INGHAM, JN0. Hofxrns. 

